1 files changed, 285 insertions, 0 deletions
diff --git a/Source/WebCore/css/CSSStyleSheet.cpp b/Source/WebCore/css/CSSStyleSheet.cpp
new file mode 100644
index 0000000..d5487a1
--- /dev/null
+++ b/Source/WebCore/css/CSSStyleSheet.cpp
@@ -0,0 +1,285 @@
+/*
+ * (C) 1999-2003 Lars Knoll (knoll@kde.org)
+ * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include "config.h"
+#include "CSSStyleSheet.h"
+
+#include "CSSImportRule.h"
+#include "CSSNamespace.h"
+#include "CSSParser.h"
+#include "CSSRuleList.h"
+#include "Document.h"
+#include "ExceptionCode.h"
+#include "HTMLNames.h"
+#include "Node.h"
+#include "SVGNames.h"
+#include "SecurityOrigin.h"
+#include "TextEncoding.h"
+#include <wtf/Deque.h>
+
+namespace WebCore {
+
+#if !ASSERT_DISABLED
+static bool isAcceptableCSSStyleSheetParent(Node* parentNode)
+{
+    // Only these nodes can be parents of StyleSheets, and they need to call clearOwnerNode() when moved out of document.
+    return !parentNode
+        || parentNode->isDocumentNode()
+        || parentNode->hasTagName(HTMLNames::linkTag)
+        || parentNode->hasTagName(HTMLNames::styleTag)
+#if ENABLE(SVG)
+        || parentNode->hasTagName(SVGNames::styleTag)
+#endif    
+        || parentNode->nodeType() == Node::PROCESSING_INSTRUCTION_NODE;
+}
+#endif
+
+CSSStyleSheet::CSSStyleSheet(CSSStyleSheet* parentSheet, const String& href, const KURL& baseURL, const String& charset)
+    : StyleSheet(parentSheet, href, baseURL)
+    , m_document(parentSheet ? parentSheet->document() : 0)
+    , m_charset(charset)
+    , m_loadCompleted(false)
+    , m_strictParsing(!parentSheet || parentSheet->useStrictParsing())
+    , m_isUserStyleSheet(parentSheet ? parentSheet->isUserStyleSheet() : false)
+    , m_hasSyntacticallyValidCSSHeader(true)
+{
+}
+
+CSSStyleSheet::CSSStyleSheet(Node* parentNode, const String& href, const KURL& baseURL, const String& charset)
+    : StyleSheet(parentNode, href, baseURL)
+    , m_document(parentNode->document())
+    , m_charset(charset)
+    , m_loadCompleted(false)
+    , m_strictParsing(false)
+    , m_isUserStyleSheet(false)
+    , m_hasSyntacticallyValidCSSHeader(true)
+{
+    ASSERT(isAcceptableCSSStyleSheetParent(parentNode));
+}
+
+CSSStyleSheet::CSSStyleSheet(CSSRule* ownerRule, const String& href, const KURL& baseURL, const String& charset)
+    : StyleSheet(ownerRule, href, baseURL)
+    , m_charset(charset)
+    , m_loadCompleted(false)
+    , m_strictParsing(!ownerRule || ownerRule->useStrictParsing())
+    , m_hasSyntacticallyValidCSSHeader(true)
+{
+    CSSStyleSheet* parentSheet = ownerRule ? ownerRule->parentStyleSheet() : 0;
+    m_document = parentSheet ? parentSheet->document() : 0;
+    m_isUserStyleSheet = parentSheet ? parentSheet->isUserStyleSheet() : false;
+}
+
+CSSStyleSheet::~CSSStyleSheet()
+{
+}
+
+CSSRule *CSSStyleSheet::ownerRule() const
+{
+    return (parent() && parent()->isRule()) ? static_cast<CSSRule*>(parent()) : 0;
+}
+
+unsigned CSSStyleSheet::insertRule(const String& rule, unsigned index, ExceptionCode& ec)
+{
+    ec = 0;
+    if (index > length()) {
+        ec = INDEX_SIZE_ERR;
+        return 0;
+    }
+    CSSParser p(useStrictParsing());
+    RefPtr<CSSRule> r = p.parseRule(this, rule);
+
+    if (!r) {
+        ec = SYNTAX_ERR;
+        return 0;
+    }
+
+    // Throw a HIERARCHY_REQUEST_ERR exception if the rule cannot be inserted at the specified index.  The best
+    // example of this is an @import rule inserted after regular rules.
+    if (index > 0) {
+        if (r->isImportRule()) {
+            // Check all the rules that come before this one to make sure they are only @charset and @import rules.
+            for (unsigned i = 0; i < index; ++i) {
+                if (!item(i)->isCharsetRule() && !item(i)->isImportRule()) {
+                    ec = HIERARCHY_REQUEST_ERR;
+                    return 0;
+                }
+            }
+        } else if (r->isCharsetRule()) {
+            // The @charset rule has to come first and there can be only one.
+            ec = HIERARCHY_REQUEST_ERR;
+            return 0;
+        }
+    }
+
+    insert(index, r.release());
+    
+    styleSheetChanged();
+    
+    return index;
+}
+
+int CSSStyleSheet::addRule(const String& selector, const String& style, int index, ExceptionCode& ec)
+{
+    insertRule(selector + " { " + style + " }", index, ec);
+
+    // As per Microsoft documentation, always return -1.
+    return -1;
+}
+
+int CSSStyleSheet::addRule(const String& selector, const String& style, ExceptionCode& ec)
+{
+    return addRule(selector, style, length(), ec);
+}
+
+PassRefPtr<CSSRuleList> CSSStyleSheet::cssRules(bool omitCharsetRules)
+{
+    KURL url = finalURL();
+    if (!url.isEmpty() && document() && !document()->securityOrigin()->canRequest(url))
+        return 0;
+    return CSSRuleList::create(this, omitCharsetRules);
+}
+
+void CSSStyleSheet::deleteRule(unsigned index, ExceptionCode& ec)
+{
+    if (index >= length()) {
+        ec = INDEX_SIZE_ERR;
+        return;
+    }
+
+    ec = 0;
+    item(index)->setParent(0);
+    remove(index);
+    styleSheetChanged();
+}
+
+void CSSStyleSheet::addNamespace(CSSParser* p, const AtomicString& prefix, const AtomicString& uri)
+{
+    if (uri.isNull())
+        return;
+
+    m_namespaces = adoptPtr(new CSSNamespace(prefix, uri, m_namespaces.release()));
+    
+    if (prefix.isEmpty())
+        // Set the default namespace on the parser so that selectors that omit namespace info will
+        // be able to pick it up easily.
+        p->m_defaultNamespace = uri;
+}
+
+const AtomicString& CSSStyleSheet::determineNamespace(const AtomicString& prefix)
+{
+    if (prefix.isNull())
+        return nullAtom; // No namespace. If an element/attribute has a namespace, we won't match it.
+    if (prefix == starAtom)
+        return starAtom; // We'll match any namespace.
+    if (m_namespaces) {
+        if (CSSNamespace* namespaceForPrefix = m_namespaces->namespaceForPrefix(prefix))
+            return namespaceForPrefix->uri;
+    }
+    return nullAtom; // Assume we won't match any namespaces.
+}
+
+bool CSSStyleSheet::parseString(const String &string, bool strict)
+{
+    return parseStringAtLine(string, strict, 0);
+}
+
+bool CSSStyleSheet::parseStringAtLine(const String& string, bool strict, int startLineNumber)
+{
+    setStrictParsing(strict);
+    CSSParser p(strict);
+    p.parseSheet(this, string, startLineNumber);
+    return true;
+}
+
+bool CSSStyleSheet::isLoading()
+{
+    unsigned len = length();
+    for (unsigned i = 0; i < len; ++i) {
+        StyleBase* rule = item(i);
+        if (rule->isImportRule() && static_cast<CSSImportRule*>(rule)->isLoading())
+            return true;
+    }
+    return false;
+}
+
+void CSSStyleSheet::checkLoaded()
+{
+    if (isLoading())
+        return;
+    if (parent())
+        parent()->checkLoaded();
+
+    // Avoid |this| being deleted by scripts that run via
+    // ScriptableDocumentParser::executeScriptsWaitingForStylesheets().
+    // See <rdar://problem/6622300>.
+    RefPtr<CSSStyleSheet> protector(this);
+    m_loadCompleted = ownerNode() ? ownerNode()->sheetLoaded() : true;
+}
+
+void CSSStyleSheet::styleSheetChanged()
+{
+    StyleBase* root = this;
+    while (StyleBase* parent = root->parent())
+        root = parent;
+    Document* documentToUpdate = root->isCSSStyleSheet() ? static_cast<CSSStyleSheet*>(root)->document() : 0;
+    
+    /* FIXME: We don't need to do everything updateStyleSelector does,
+     * basically we just need to recreate the document's selector with the
+     * already existing style sheets.
+     */
+    if (documentToUpdate)
+        documentToUpdate->styleSelectorChanged(DeferRecalcStyle);
+}
+
+KURL CSSStyleSheet::completeURL(const String& url) const
+{
+    // Always return a null URL when passed a null string.
+    // FIXME: Should we change the KURL constructor to have this behavior?
+    // See also Document::completeURL(const String&)
+    if (url.isNull() || m_charset.isEmpty())
+        return StyleSheet::completeURL(url);
+    const TextEncoding encoding = TextEncoding(m_charset);
+    return KURL(baseURL(), url, encoding);
+}
+
+void CSSStyleSheet::addSubresourceStyleURLs(ListHashSet<KURL>& urls)
+{
+    Deque<CSSStyleSheet*> styleSheetQueue;
+    styleSheetQueue.append(this);
+
+    while (!styleSheetQueue.isEmpty()) {
+        CSSStyleSheet* styleSheet = styleSheetQueue.takeFirst();
+
+        for (unsigned i = 0; i < styleSheet->length(); ++i) {
+            StyleBase* styleBase = styleSheet->item(i);
+            if (!styleBase->isRule())
+                continue;
+            
+            CSSRule* rule = static_cast<CSSRule*>(styleBase);
+            if (rule->isImportRule()) {
+                if (CSSStyleSheet* ruleStyleSheet = static_cast<CSSImportRule*>(rule)->styleSheet())
+                    styleSheetQueue.append(ruleStyleSheet);
+            }
+            rule->addSubresourceStyleURLs(urls);
+        }
+    }
+}
+
+}